City of Chicago


312 Area code: Chicago, Cook - Landline

Directory Numbers

How to dial a U.S. number internationally:

  • Start with your country's exit code (e.g., 011 for the U.S. or Canada).
  • Dial the U.S. country code (+1).
  • Dial the 10-digit phone number (area code + local number).

  • 3123811200 | +1 312-381-1200 Illinois U.S.A.
  • 3123811201 | +1 312-381-1201 Illinois U.S.A.
  • 3123811202 | +1 312-381-1202 Illinois U.S.A.
  • 3123811203 | +1 312-381-1203 Illinois U.S.A.
  • 3123811204 | +1 312-381-1204 Illinois U.S.A.
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  • 3123811206 | +1 312-381-1206 Illinois U.S.A.
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  • 3123811210 | +1 312-381-1210 Illinois U.S.A.
  • 3123811211 | +1 312-381-1211 Illinois U.S.A.
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  • 3123811234 | +1 312-381-1234 Illinois U.S.A.
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  • 3123811278 | +1 312-381-1278 Illinois U.S.A.
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  • 3123811280 | +1 312-381-1280 Illinois U.S.A.
  • 3123811281 | +1 312-381-1281 Illinois U.S.A.
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